<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <div>
        <input type="text" v-model="n1">
        <input type="text" v-model="n2">
        <input type="button" value="加" @click="f('+')">
        <input type="button" value="减" @click="f('-')">
        <input type="button" value="乘" @click="f('*')">
        <input type="button" value="除" @click="f('/')">
        <h1>结果:{{result}}</h1>
    </div>
    <script src="../js/vue.js"></script>
    <script>
        let v = new Vue({
            el:"div",
            data:{
                n1:"",
                n2:"",
                result:""
            },
            methods:{
                f(x) {
                    //eval()可以将字符串以代码的形式执行
                    v.result = eval(v.n1+x+v.n2);
                }
            }
        })
    </script>
</body>
</html>